That is exactly what it is looking like. A very well planned mission by someone here for less than a year. Nobody would suspect Shanghai although it is very close to Indonesia and Philipeans etc. which is a Mooselimb breeding ground.
Pray for W and Va Tech
I suspect a lone nut at this point. I would imagine if it were terrorism, they would be now have sent out their manifesto, with threats of more to come—or at least we would be picking up that international chatter through NSA channels, etc..
There are a number of indications that this was an organized killer. Chaining the doors, abundant ammunition, bullet proof vest, serial numbers removed, timing, perhaps an accomplice creating a diversion, potentially bomb scares to test security. This doesn't appear to be a jilted lover gone crazy in a moment of passion.
If this is connected to terrorists, you can expect other incidences to follow soon ... the terror aspect is so far an unthinkable, but the next if it occurs will explode the terror aspect on the American psyche. I would guess the follow on would happen within a week, somewhere in the mid-West or on the West coast. Frankly, I’m thinking along the lines of a planned suicide murder/terrorist connected action which is only starting. We will know soon enough.